<html>
<head>
    <script src="../vue.js"></script>
</head>
<body>
<div id="root">
    <ul>
        <task>this is content</task>
    </ul>
</div>
</body>
<script src="./main.js"></script>
<script>
    var app=new Vue({
        el:'#root',
        data:{
            
        }
    });
</script>
</html>